WM7230IMSE/RV

WM7230IMSE/RV Datasheet

WM7230, WM7230E

Part	Datasheet
WM7230IMSE/RV	WM7230IMSE/RV (pdf)

PDF Datasheet Preview
WM7230, WM7230E Bottom Port Digital Silicon Microphone The WM7230 is a low-profile silicon digital microphone. It offers high Signal to Noise Ratio SNR and low power consumption and is suited to a wide variety of consumer applications. The WM7230 incorporates Wolfson’s proprietary CMOS/MEMS membrane technology, offering high reliability and high performance in a miniature, low-profile package. The WM7230 is designed to withstand the high temperatures associated with automated flow solder assembly processes. Note that conventional microphones can be damaged by this process. The WM7230 incorporates a high performance ADC, which outputs a single-bit Pulse Density Modulated PDM audio data stream. The WM7230 supports selectable left/right channel assignment for a two-channel digital microphone interface, enabling efficient connection of multiple microphones in stereo/array configurations. The WM7230E variant offers a tighter tolerance on the microphone sensitivity, giving reduced variation between parts. This removes the need for in-line production calibration of part-to-part microphone variations. • High SNR selectable sensitivity tolerance options - WM7230 SNR 61dB, Sensitivity +/-3dB - WM7230E SNR 61dB, Sensitivity +/-1dB • Low power - Sleep Mode - 2uA - Normal Operation - 735uA • Low profile packaging • Support for automated flow solder assembly • PDM Digital audio output • Stereo/array operation • Proprietary ADC technology - Reduced clock jitter sensitivity - Low noise floor modulation - Stable in overload condition • Bottom Port Package • 1.64V to 3.7V supply • mm x mm x 1.00mm Thin Package Design BLOCK DIAGRAM • Mobile telephone handsets • Portable computers • Portable media players • Digital still cameras • Digital video cameras • Bluetooth headsets • Portable navigation devices Transducer CMOS MEMS CHARGE PUMP CONTROL CLK DAT LRSEL WM7230 WOLFSON MICROELECTRONICS plc WM7230 TABLE OF CONTENTS Pre-Production 1 FEATURES 1 BLOCK DIAGRAM 1 TABLE OF 2 PIN CONFIGURATION 3 PIN 3 ORDERING 3 ABSOLUTE MAXIMUM RATINGS 4 IMPORTANT ASSEMBLY GUIDELINES 4 RECOMMENDED OPERATING 4 ACOUSTIC AND ELECTRICAL CHARACTERISTICS 5 TERMINOLOGY 6 AUDIO INTERFACE TIMING 6 TYPICAL PERFORMANCE 8 FREQUENCY RESPONSE 8 THD RATIO 8 APPLICATIONS INFORMATION 9 RECOMMENDED EXTERNAL COMPONENTS 9 OPTIMISED SYSTEM RF DESIGN 9 CONNECTION TO A WOLFSON AUDIO CODEC 9 RECOMMENDED PCB LAND PATTERNS 10 PACKAGE DIMENSIONS 11 IMPORTANT NOTICE 12 ADDRESS 12 Pre-Production PIN CONFIGURATION WM7230 PIN DESCRIPTION NAME LRSEL TYPE Digital Input Digital Output Supply Digital Input Clock input PDM Data Output Power Supply Ground Channel Select 0 = Data output following falling CLK edge 1 = Data output following rising CLK edge ORDERING INFORMATION DEVICE WM7230IMS/RV Standard tape and reel WM7230IMSE/RV Standard Enhanced tape and reel Note: Reel quantity = 4800 All devices are Pb-free and Halogen free. TEMPERATURE RANGE -40 to +100oC -40 to +100oC MOISTURE SENSITIVITY LEVEL MSL2A PEAK SOLDERING TEMPERATURE +260oC +260oC WM7230 Pre-Production ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical Characteristics at the test conditions specified. ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage of this device. Wolfson tests its package types according to IPC/JEDEC J-STD-020 for Moisture Sensitivity to determine acceptable storage conditions prior to surface mount assembly. These levels are: MSL1 = unlimited floor life at <30C / 85% Relative Humidity. Not normally stored in moisture barrier bag. MSL2 = out of bag storage for 1 year at <30C / 60% Relative Humidity. Supplied in moisture barrier bag. MSL2A = out of bag storage for 4 weeks at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag. MSL3 = out of bag storage for 168 hours at <30C / 60% Relative Humidity. Supplied in moisture barrier bag. The Moisture Sensitivity Level for each package type is specified in Ordering Information. CONDITION Supply Voltage VDD Voltage range digital inputs LRSEL and CLK Operating temperature range, TA Storage temperature prior to soldering Storage temperature after soldering -0.3V +4.2V GND-0.3V VDD+0.3V -40ºC +100ºC 30C max / 60% RH max -40ºC +100ºC IMPORTANT ASSEMBLY GUIDELINES Do not put a vacuum over the port hole of the microphone. Placing a vacuum over the port hole can damage the device. Do not board wash the microphone after a re-flow process. Board washing and the associated cleaning agents can damage the device. Do not expose to ultrasonic cleaning methods. Do not use vapour phase re-flow process. The vapour can damage the device. Please refer to application note WAN0273 MEMS MIC Assembly and Handling Guidelines for further assembly and handling guidelines. RECOMMENDED OPERATING CONDITIONS PARAMETER Digital Supply Range Ground Clock Frequency VDD GND FCLK UNIT V MHz Pre-Production ACOUSTIC AND ELECTRICAL CHARACTERISTICS WM7230 Test Conditions VDD=1.8V, 1kHz test signal, CLK=2.4MHz, TA = 25°C PARAMETER TEST CONDITIONS UNIT Directivity Omni-directional Polarity see note Positive sound pressure Decreasing density of 1’s Sensitivity WM7230 94 dB SPL dBFS Sensitivity WM7230E 94 dB SPL dBFS Updated the LRSEL pin description , Timing diagram and notes for the rising and falling clock edges. Sleep mode current updated to 2uA Updated the reel quantity Updated the start up time Updated the new freq response and THD curves Updated +3dB frequency cut off Updated VDD to 1.64V Package Diagram updated to DM089.E. References and dimension letters changed to be consistent with all mems package diagrams. Lid dimensions updated. Swapped dimensions L and E. Added marking area boundary Introduced E variant with sensitivity +/-1dB Added E variant ordering info Added voltage range digital input Updated the CODEC to WM8994 Added Reference to WAN_0273 Dynamic Range added, p5 Active mode current changed to 700uA, p1 and p5 CLK cycle time min and max updated, p6 Package Diagram updated to DM089F Optimised System RF Design added. Package Diagram updated to DM089.G 08/11/13 08/11/13 11/11/13 18/12/13 JMacD Updated to pre-production status. Package Diagram updated port hole tolerance added. Updated CODEC reference to WM8280. Acoustic and Electrical Characteristics updated Polarity added PSR updated Note added

PDF Datasheet Preview

WM7230, WM7230E

Bottom Port Digital Silicon Microphone

The WM7230 is a low-profile silicon digital microphone. It offers high Signal to Noise Ratio SNR and low power consumption and is suited to a wide variety of consumer applications.

The WM7230 incorporates Wolfson’s proprietary CMOS/MEMS membrane technology, offering high reliability and high performance in a miniature, low-profile package. The WM7230 is designed to withstand the high temperatures associated with automated flow solder assembly processes. Note that conventional microphones can be damaged by this process.

The WM7230 incorporates a high performance ADC, which outputs a single-bit Pulse Density Modulated PDM audio data stream. The WM7230 supports selectable left/right channel assignment for a two-channel digital microphone interface, enabling efficient connection of multiple microphones in stereo/array configurations.

The WM7230E variant offers a tighter tolerance on the microphone sensitivity, giving reduced variation between parts. This removes the need for in-line production calibration of part-to-part microphone variations.
• High SNR selectable sensitivity tolerance options - WM7230 SNR 61dB, Sensitivity +/-3dB - WM7230E SNR 61dB, Sensitivity +/-1dB
• Low power - Sleep Mode - 2uA - Normal Operation - 735uA
• Low profile packaging
• Support for automated flow solder assembly
• PDM Digital audio output
• Stereo/array operation
• Proprietary ADC technology
- Reduced clock jitter sensitivity - Low noise floor modulation - Stable in overload condition
• Bottom Port Package
• 1.64V to 3.7V supply
• mm x mm x 1.00mm Thin Package Design

BLOCK DIAGRAM
• Mobile telephone handsets
• Portable computers
• Portable media players
• Digital still cameras
• Digital video cameras
• Bluetooth headsets
• Portable navigation devices

Transducer CMOS MEMS

CHARGE PUMP

CONTROL

CLK DAT LRSEL

WM7230

WOLFSON MICROELECTRONICS plc

WM7230

TABLE OF CONTENTS

Pre-Production
1 FEATURES 1 BLOCK DIAGRAM 1 TABLE OF 2 PIN CONFIGURATION 3 PIN 3 ORDERING 3 ABSOLUTE MAXIMUM RATINGS 4 IMPORTANT ASSEMBLY GUIDELINES 4 RECOMMENDED OPERATING 4 ACOUSTIC AND ELECTRICAL CHARACTERISTICS 5

TERMINOLOGY 6 AUDIO INTERFACE TIMING 6

TYPICAL PERFORMANCE 8

FREQUENCY RESPONSE 8 THD RATIO 8

APPLICATIONS INFORMATION 9

RECOMMENDED EXTERNAL COMPONENTS 9 OPTIMISED SYSTEM RF DESIGN 9 CONNECTION TO A WOLFSON AUDIO CODEC 9 RECOMMENDED PCB LAND PATTERNS 10

PACKAGE DIMENSIONS 11 IMPORTANT NOTICE 12

ADDRESS 12

Pre-Production

PIN CONFIGURATION

WM7230

PIN DESCRIPTION

NAME

LRSEL

TYPE

Digital Input Digital Output

Supply Digital Input

Clock input PDM Data Output Power Supply Ground Channel Select 0 = Data output following falling CLK edge 1 = Data output following rising CLK edge
ORDERING INFORMATION

DEVICE

WM7230IMS/RV

Standard tape and reel

WM7230IMSE/RV

Standard Enhanced tape and reel

Note:

Reel quantity = 4800 All devices are Pb-free and Halogen free.

TEMPERATURE RANGE
-40 to +100oC -40 to +100oC

MOISTURE SENSITIVITY LEVEL

MSL2A

PEAK SOLDERING TEMPERATURE
+260oC +260oC

WM7230

Pre-Production

ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical Characteristics at the test conditions specified.

ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage of this device.

Wolfson tests its package types according to IPC/JEDEC J-STD-020 for Moisture Sensitivity to determine acceptable storage conditions prior to surface mount assembly. These levels are:
MSL1 = unlimited floor life at <30C / 85% Relative Humidity. Not normally stored in moisture barrier bag. MSL2 = out of bag storage for 1 year at <30C / 60% Relative Humidity. Supplied in moisture barrier bag. MSL2A = out of bag storage for 4 weeks at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag. MSL3 = out of bag storage for 168 hours at <30C / 60% Relative Humidity. Supplied in moisture barrier bag. The Moisture Sensitivity Level for each package type is specified in Ordering Information.

CONDITION

Supply Voltage VDD Voltage range digital inputs LRSEL and CLK Operating temperature range, TA Storage temperature prior to soldering Storage temperature after soldering
-0.3V
+4.2V

GND-0.3V

VDD+0.3V
-40ºC
+100ºC
30C max / 60% RH max
-40ºC
+100ºC

IMPORTANT ASSEMBLY GUIDELINES

Do not put a vacuum over the port hole of the microphone. Placing a vacuum over the port hole can damage the device.

Do not board wash the microphone after a re-flow process. Board washing and the associated cleaning agents can damage the device. Do not expose to ultrasonic cleaning methods.

Do not use vapour phase re-flow process. The vapour can damage the device.

Please refer to application note WAN0273 MEMS MIC Assembly and Handling Guidelines for further assembly and handling guidelines.

RECOMMENDED OPERATING CONDITIONS

PARAMETER

Digital Supply Range Ground Clock Frequency

VDD GND FCLK

UNIT

V MHz

Pre-Production

ACOUSTIC AND ELECTRICAL CHARACTERISTICS

WM7230

Test Conditions VDD=1.8V, 1kHz test signal, CLK=2.4MHz, TA = 25°C

PARAMETER

TEST CONDITIONS

UNIT

Directivity

Omni-directional

Polarity see note

Positive sound pressure

Decreasing density of 1’s

Sensitivity WM7230
94 dB SPL
dBFS

Sensitivity WM7230E
94 dB SPL
dBFS
Updated the LRSEL pin description , Timing diagram and notes for the rising and falling clock edges. Sleep mode current updated to 2uA Updated the reel quantity Updated the start up time Updated the new freq response and THD curves Updated +3dB frequency cut off Updated VDD to 1.64V Package Diagram updated to DM089.E. References and dimension letters changed to be consistent with all mems package diagrams. Lid dimensions updated. Swapped dimensions L and E. Added marking area boundary Introduced E variant with sensitivity +/-1dB Added E variant ordering info Added voltage range digital input Updated the CODEC to WM8994 Added Reference to WAN_0273 Dynamic Range added, p5 Active mode current changed to 700uA, p1 and p5 CLK cycle time min and max updated, p6 Package Diagram updated to DM089F Optimised System RF Design added.

Package Diagram updated to DM089.G
08/11/13
08/11/13
11/11/13
18/12/13

JMacD

Updated to pre-production status.

Package Diagram updated port hole tolerance added.

Updated CODEC reference to WM8280.

Acoustic and Electrical Characteristics updated Polarity added PSR updated Note added

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Datasheet ID: WM7230IMSE/RV 523265